Extension-table.



H. W. BRADNER.

EXTENSION TABLE.

APPLICATION FILED MAY zo, 1912. 1,@8o,@43

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H. W. EEADNEE.

EXTENSION TABLE.

APPLICATION FILED MAY 20, 1912.

- Patented Dec.2,1913.

2 SHEETS-SHEET Q.

HARRY Vf. BRADNER, F TACOMA, W'ASLNGTON, ASSIGNOR. BY DIRECT AND MESNE ENIS COMPANY, TNG., OF NEW .3.7131351213 N. Y.,

- EXTENSIOILTABLE.

Lil/80,643.

Specification of Letters atent.

Patented Dele. 2,

Application led May 20, 1912. Serial No. 693x147.

To .all 'whom it may concern:

.Be it known that I, HARRY il". Bewoner, a citizen of the United States, residing` at Tacoma, in the county of Pierce `and Eltate of lliashington, have invented a` certain new and useful improvement in Extension-fla bles, of which the following is a spec-ification. w

The invention relates to extension tables in the e of household furniture and .more particularly lo lthattype supported at the renter by a pedestal leg;7 and the objects ot' the invention are to provide meehanism by which the halves ofthe table-top are so connected as to move oppoeitely to equal distunee in the opening` and Closing' movements, thus maintaining balance,- and permitting the table to beI opened or closed by one person alone at one end, the other end moving' automatically, and to pro-vide means vt'or insuring the easy movement` of the slides and lessening' or entirely avoiding lthe liability ot the moving parte to bind.

The invention eonsistsin certain .novel i'eaturehy and details of construction by which the .aboveobjeets are attained, to be hereinafter described. y

The e.ecom1nt11yinlg drawings form of this specification and show an form of the invention.

Figure 1 is a plan view of the table in the opened condition. l4`ig. 2 is a planv view of the slides and connected scale, he table-top being indicated by dotted lines. 3 is al corresponding vertical section taken transversely of the Slides on the dividingline of lthe tabletop, and partly in ele tation. 4 is a Central ver` tical .section et u portion, 'taken :it a right, angle to the view in Fig', 3, and partly in elevation. The remaining guree are on u Still larger soule and show of the elidee. Fig'. 5 is a transverse vertical section through the slides. lfig'. o a rorrerponding horizontal section, partly in plan view, the plane o1 seetion beinl indi.-

a.- part approved .cated by the line 6 6 in F 'l ie an elevation of the working face oli one of the Slides. v

Similar letters of reference indient-e the same parts in all the figures.

A is the upper part of a pedestal haring? a cap-piece A1 carrying the opera .ing meenana-rts on .a larger the construction nism and supporting' the two halves A2 h2 of the tabletop. llflounted upon and fixed to the eaopieee near each end is a fixed guide C forming the Central member of a eet ot' .slides to be further described, and et. the center, lying parallel'with the Slides, .is fixed a. bar l) extending' diumetrioally of the table and as nearly as may be to the outer merg-in of each half of the table-top, when in the closed Condition; it Carries on its upper i'tlee at eueh end a pulley E par:- tially encircled by a Cord or belt F which in in effeeteontinuous but is divided at, two l. oints for attachment to the ends oi" arms G G lo ated between the, center-bar D and the sets of slides, each fixed to` one portion ot' the'table-toi') and extendingsome distance beyond the dividing line between the two halves thereof. ily this arrangement of corde and pulleys u nlovement of one portion oit' the table-top is eonnnunieuted to the other, so that in opening' or closingthe table-top the movement of one half in either direction-:xuttrnmtieully causes a correspondinginovement of the other halt to the same Vent and in the opposite direction, thus insuring the desired balance and permitting the opening' and rlosing movements to be easily effected by one person pulling` or thrusting on one ot' the halves alone.

ln order to utiliye elfectually the support offered to each half by the overhanging ends ot the strong;` central bar l). the vertical pins El El serving' as centers for the pulleys E E are eueh provided with a forked head or yoke E2 in whieli is mounted a small groovrd roller il uiatrhing' to a cylindrical trael: l-l on the under fare of eaeh portion of the tableftoiji. und u'liieh muyv be drieal wire lying upon or partially embedded in :meh i'ttee and seeured by driving its upturned ends il? lll into the material of the table.

The tracks und rollersl ilermit the tabletop to be supported by the Central bar D, at points as distant as practicable from the @enter oit the table, and allows the halves to be moved :nitilirietionally relatively to Such bar. The sets ot' slides are also constructed a eylinw to move with a minimum of friction while maintaining reliable engagement each with ite neighbor. dach set is a counterpart, of the other and t nnprises the .relatively fixed central member' C above referred to, and a slidable member .lor K on eachiof the side faces thereof, one attached to one portion of the tabletop and the other to the opposite portion, to move therewith.

The adjacent faces of the several slides J, C, K, are grooved nea-r the upper and lovver edges to produce channels as at j c /c and form the longitudinally extending central ribs J1 C1 C2 K1 between the channels. On each rib is a strip or fiat bar of metal B avider than the rib and extending. partially over'the adjacent channels, and having its edges rounded. These strips B B lie face to face in pairs and at one end each is `forked as at Bl and the branches foldedto form housii'igs B2 receiving pins B3 serving as shafts for small rollers B4 mounted in the housings and grooved on the periphery to match closely to and engage the rounded edges of the adjacent strip.

The fork B1 of each strip is at the opposite end from its neighbor, and the overhanging portions of the housingsl and their rollers are received in the channels. 'The strips of' each pair are thus joined together with liberty to move longitudinally relatively to each other with their attached slides, the rollers serving as the means of en gagemcnt and in reducing the friction.

To limit the outward movement of the strips and slides and the separation of the two halves of' the table-top, a projection or spur B5 is produced on the upper edge of each strip at the proper location, arranged to strike or be struck by the upper roller B4 of the adjacent strip and arrest the out- Ward movement.; the inward movement is arrested by the contact of the two halves 01"' the table-top, aswill Le understood.

Thus constructed and arranged, the several parts or' the table are reliably joined while the required movements are permit-ted with but little friction, and slight changes of the materials employ-ed, due to hygrometric conditions, do not interfere with -the working` of the n'lechanism.l I

Modifications may be made in the forms and proportions of parting from .the invention, and parts may be used Without the Whole,

The`cord F may bea chain or other fiexi the parts Without deble connection, and. the track H1 niay be con` structed and attached in a dilerent manner than that shown and described.

No claim is made herein to the outer slide structure, as the same forms the subjectmatter ot an application filed February 8, 1913, as a division thereof, ASerial No. 747,026.

I claim 1. An extension table having a bar eX- tending transversely of the table-joint and a horizontally arranged pulley at each endof said bar, cords attached to the halves of the table-top vand extending partially around said pulleys to induce equal and opposite movements of such halves, a track on -the under face of each of said halves, and vertically arranged rollers mounted on said bar in engagement with said tracks.

2. An extension table having a bar extendingtransversely ot the table-joint and a horizontally arranged pulley at each end of said bar, cords attached to the halves of the table-top and extending partially around .said pulleys to induce 4equal and opposite movements of such halves, a track on the'under face of each of said halves, pins serving as centers for said pulleys, a yoke on the upper end of cally arranged roller supported in said' yoke, said rollers adapted to enga-ge said tracks.

3. An extension table havinga bar extending transversely o the table-joint and a horizontally arranged pulley ateach end of said bar, cords attached to the halves of the table-'top and extending partially around said pulleys to induce equal and opposite movements of such halves, a cylindrical track on the under face of each of said halves, pins serving as centers for said pulleys, a yoke on pins, and a vertically arranged grooved roller supported in said yoke, said rollers adapted to engage said tracks.

In testimony that l claim the invention labove set forth I aiiix my signature, in presence of two Witnesses.

HARRY W. BRA'DNE'R.

Nitnessesz FRANK W. HYLAND, Gannon W, RYAN.

each of said pms, and a vertithe upper end of each of said 

